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Effects of Feeding Perennial Peanut Hay on Growth, Development, Attainment of Puberty, and Fertility in Beef Replacement Heifers

出版	University of Florida, 2011
URL	http://books.google.com.hk/books?id=YEsSnQAACAAJ&hl=&source=gbs_api

註釋ABSTRACT: The objective of this study was to determine the influence of supplemental feeding of perennial peanut hay (Arachis glabrata Benth.) on growth performance and age at puberty in growing beef cattle heifers. Over a two year period, 120 heifers were randomly allocated into pens and assigned to one of three supplement treatments: 80% corn and 20% soybean meal supplement (CSBM), perennial peanut hay supplementation (PPH), and a control which received no supplement (CON). All heifers received ad libitum access to bermudagrass hay (Cynodon dactylon (L.) Pers.) during the 140-developmental phase. Following the developmental phase, heifers were comingled for a 77 d breeding season during the breeding phase. Period influenced ADG (P = 0.002) and treatment effected ADG, with the CON tending (P = 0.06) to be have lesser ADG than the CSBM and PPH heifers. There was a treatment × day interaction (P = 0.06) on mean body weight (BW) with heifers in the CON treatment being lighter at the conclusion of the development phase (P = 0.02). Total DMI during the 140-d development phase was greater (P